Question
Answer the following
Explain the trends in atomic radii of d block elements.
✓
Answer
- Atomic radii of the elements of the transition series decrease gradually from left to right.
- As we move across a transition series from left to right, the nuclear charge increases by one unit at a time.
- The last filled electron enters a penultimate (n - 1)d subshell. However, d orbitals in an atom are less penetrating or more diffused and, therefore d electrons offer smaller screening effects.
- The result is that effective nuclear charge also increases as the atomic number increases along with a transition series. Hence, the atomic radii gradually decrease across a transition series from left to right.
Trends in atomic radii of d block elements
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